/Engine/Source/Runtime/SlateCore/Public/Textures/TextureAtlas.h
Copies texture data into the atlas at a given slot
void CopyDataIntoSlot ( const [FAtlasedTextureSlot](API\Runtime\SlateCore\Textures\FAtlasedTextureSlot) * SlotToCopyTo, const [TArray](API\Runtime\Core\Containers\TArray)< uint8 > & Data )